Inkscape is a open source vector image editor, similiar to Adobe Illustrator or Corel Draw.

Click here for the online manual.

Windows users: click the download button below. For other platforms click here .

GIMP is the premier open source alternative to Photoshop.

The download button below is for Windows 2000 and older. Click here to see other platforms supported.

Also, check out the GIMP online manual.